Starting with the basics
2 main divisions of the nervous system
What is central and peripheral nervous system?
the tough white outer layer of the eye
What is the sclera?
the part of the eye that focuses the rays of light
What is the lens?
this nerve carries electrical messages to the brain where they are translated into meaningful sounds
What is the auditory nerve?
the 3 bones of the middle ear
What is the hammer, anvil, and stirrup?
3 main parts of the brain
What is the cerebrum, cerebellum, brain stem?
transparent covering through which light
What is the cornea?
the gland that produces tears
What is the lacrimal gland?
this nerve is responsible for carrying impulses from specific regions of the retina to the brain
What is the optic nerve?
this part of the ear collects sound waves and directs them into the ear
What is the outer ear?
the 3 main parts of a neuron
What are the axon, cell body, and dendrite?
cells in the retina responsible for detecting color
What are cones?
the opening through which light enters the eye
What is the pupil?
this nerve carries signals from the nasal cavity to the brain
What is the olfactory nerve?
the sensory structures within the ear that contribute to balance
What are semicircular canals?
the 3 broad categories of neurons
What are motor, sensory, and interneurons?
The innermost portion of the eye that detects light and produces nerve pulses
What is the retina?
the colored portion of the eye
What is the iris?
most of these nerves contain both sensory and motor neurons
What are mixed nerves?
the defective vision caused by an asymmetrically curved cornea
What is astigmatism?
The 4 lobes of the cerebrum?
What are parietal, occipital, frontal, and temporal?
Clear fluid between the cornea and lens that helps keep the eye firm and in proper shape
What is aqueous humor?
cells in the retina responsible for detecting light and dark
What are the rods?
This disease of the nervous system causes tremors and stiffness of the limbs, affecting one's control of posture and movement
What is Parkinson's disease?
the small, depressed area at the back of the eye that produces the clearest vision
What is the fovea?